Sony Ericsson Cordless DT590 - Manual (Page 109)

109 MD Evolution – Cordless DT590
More Features on your Extension
Account Codes
When a call is placed on the public ISDN network, the network
transmits the charges for the current call, which are then
accounted to a charge counter associated with your extension.
According to your working mode, you may wish to impute the cost
of your external calls to different accounts. Your telephone system
can do this through account codes that you simply enter when
placing outgoing external calls.
To establish an outgoing external call using an account code :
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First, dial the network access prefix adapted to this service.
Generally, this consists of a network access prefix that is reserved
for placing outgoing external calls that are subject to account
codes. Ask your system administrator for this prefix.
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Then, directly dial the account code to which your external
call should be imputed.
Account code formats are a fixed length. All account codes are
typically 4 digits, however they may reach up to 15 digits in length.
Generally, they end with "#", which acts as a separator. In all cases,
account codes are defined by your system administrator. ¿
Next, dial the desired external phone number.
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Press
Your outgoing external call is then transmitted over the public
network, just as an external call without an account code would be.